i went there this past summer, and it's really cool.... also a little depressing in places.... all the old ride stuff they have (a horizons ride vehicle, and an old kilmanjaro safaris plane)
but they have a ton of used furniture from the resorts, at really good prices
my mom bought 3 pillow shams from the grand floridian resort for 10$ a piece while online they were like 50$ and she bought a luggage holder from POFQ too, for her bedroom.
me i got a 25th anniversary park map... but they're always gettin new stuff.... it's really cool to see the warehouse..
However it's really hard to find.... it's about 45 minutes from Disney and in the middle of tons of orange groves.. but it's worth it.